Plastic bag



FIG. 1 is a top plan view of a plastic bag in a first position according to a preferred embodiment of my design;

FIG. 2 is a side elevational view of the plastic bag of FIG. 1 in the first position;

FIG. 3 is a end elevational view of the plastic bag of FIG. 1 in the first position;

FIG. 4 is a perspective view of the plastic bag of FIG. 1 in the first position;

FIG. 5 is a perspective view of the plastic bag of FIG. 1 in a second intermediate position, with the hand of a user shown in dotted outline; and,

FIG. 6 is a perspective view of the plastic bag of FIG. 1 in a third position, with an originally inner face of the plastic bag facing outward.

The broken line showing of a hand is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a plastic bag, as shown and described. 